Summarize diffs in fuzzy match results

Differences in fuzzy matches are shown in the highlighted diffs in the fuzzy match panel for each word instead for all words together, that are different in a row.

The reason for this is, that the whitespace between the words is not recognized as difference (which it of course is not from a tech perspective).

Therefore we should ignore spaces in this regard and mark everything in one diff, if the only not-diffed stuff are whitespaces.

See screen as example